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카드뮴 독성에 대한 Metallothionein의 보호 작용
이샛별,김완종 순천향대학교 기초과학연구소 2005 순천향자연과학연구 논문집 Vol.11 No.1
The protective roles of metallothionein(MT) exogeneously adiministered have been examined in the liver and kidney of cadmium(Cd) treated mouse, In Cd treated mouse, cellular damages such as nuclear pyknosis and necrosis were observed, Increased intercellular spaces and obscure liver lobules were often observed. The extent of damages of liver cells in Cd-MT treated group decreased compared with Cd treated group. And also, MT reactivity of this group was prominent in nuclei and cytoplasm. The enzyme activities of ALT and AST showed less alterations in CchMT treated group. In the case of kidney, protective effects of MT against Cd toxicity were comparatively not clear, In conclusion, these experimental results suggest that metallothionein reduces cellular damages resulted from cadmium in the liver of mouse.
Dehydration of D-xylose into furfural over H-zeolites
Saet Byul Kim,박은덕,Su Jin You,김용태,SangMin Lee,Hyokyu Lee,Kihyun Park 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.3
The liquid-phase dehydration of D-xylose into furfural was carried out over various H-zeolites-H-ferrierite,H-β, H-ZSM-5, H-Y and H-mordenite-with various SiO_2/Al_2O_3 molar ratios in different solvent systems: water, dimethyl sulfoxide (DMSO) and a mixture of water and toluene (water/toluene). For comparison, γ-Al_2O-3 and silica-alumina were also examined. FT-IR spectroscopy after pyridine adsorption was conducted to probe the acidity of the H-zeolites. The D-xylose conversion and furfural yield generally decreased with increasing SiO_2/Al_2O_3 molar ratio over the Hzeolites having the same crystal structure irrespective of the kind of solvent system. This is closely related to the accessible acid sites. In a comparison study using the three different solvent systems, the D-xylose conversion and furfural selectivity generally decreased in the following order: water/toluene>DMSO>water. In water and water/toluene, H-β(25) showed the highest furfural selectivity at a similar D-xylose conversion among the tested zeolites. On the other hand, H-mordenite (20) showed the highest furfural selectivity at a similar D-xylose conversion in DMSO.
Color plan of Instagram Application Icon and UI
Saet byul Kim,Su min Kim,Yeon mi Kim,Chae eun Han 한국색채학회 2017 AIC 2017 Jeju Vol.2017 No.10
This study was conducted with the aim of proposing a color plan and for redesigning the identity strategy for Instagram by investigating and analyzing the pros and cons before and after the designing of Icons and UI and changing of color in the applications of Instagram, which is a type of interesting image-based SNS application with increasing users in recent years catering to the needs of the changing times. We conducted a survey about the advantages and disadvantages before and after the change of the target color and major designs of the application among youngsters in their twenties, who were familiar with the images and SNS, and could physiologically recognize colors well. The results of the survey were as follows: the respondents reported insufficient connectivity in the case of excessive color changes by Instagram and disappearance of the company`s unique identity as disadvantages while giving a positive response for a streamlined flat design, tailored as per the trend. Therefore, we maintained the existing icon colors used before the change and the retro-sensibility and rainbow colors unique to Instagram. We also proposed that in the UI, the button should change to a chromatic color after the reaction so that users can use it more conveniently. As evident from this study, it is important to choose colors to which more people can connect with, when redesigning. Moreover, careful choice is required when redirecting because consumers are not comfortable with or feel the lack of connection in case of much dramatic changes and several other considerations must be taken, when changing familiar designs.